The dozens of unconventional beliefs they have are overshadowed by their belief that Jesus isn't God (rejection of the trinity), and the belief that Jesus didn''t physically rise from the dead.

If Christians applied this thinking into the past, many of your saints as well as Jesus' disciples and apostles were not Christian.
Thsi is the only thing I find weird, many Christians today call them 'not Christian' but have no problem with the fact that the majority of the proto-orthodox Church was not even trinitarian in the past (according to Tertullian) or that even Arianism itself was only viewed as a heresy by trinitarians, not unchristian (and Arianism was actually more popular than trinitarianism for centuries after Nicea but trinitarian Christians today still claim those people as 'Christian').

Anyway, sorry for the rant.